04e6:511b — SmartCard Reader (SCM Microsystems, Inc.)

What is this device?

This is the USB identifier for a SmartCard Reader manufactured by SCM Microsystems, Inc.. The vendor ID 04e6 is registered to SCM Microsystems, Inc. with the USB Implementers Forum, and 511b is the product ID that SCM Microsystems, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 04e6:511b SCM Microsystems, Inc. SmartCard Reader.

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 04e6:511b SCM Microsystems, Inc. SmartCard Reader

You can filter directly with lsusb -d 04e6:511b, or get the full descriptor dump with lsusb -v -d 04e6:511b. Kernel messages from dmesg show the same pair as idVendor=04e6, idProduct=511b.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_04E6&PID_511B
USB\VID_04E6&PID_511B&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04E6&PID_511B"

macOS

$ system_profiler SPUSBDataType
    SmartCard Reader:
      Product ID: 0x511b
      Vendor ID: 0x04e6  (SCM Microsystems, Inc.)

Driver help

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.

Raw usb.ids entry

The exact lines this page is generated from, in the upstream source file:

04e6  SCM Microsystems, Inc.
	511b  SmartCard Reader

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